<template>
  <el-card>
    <div slot="header">
      <el-steps :active="activeStep" simple>
        <el-step :title="item.title" :icon="item.icon" v-for="(item, index) in steps" :key="index"
          @click.native="activeStep = index"></el-step>
      </el-steps>
    </div>
    <el-form label-width="80px">
      <div v-show="activeStep === 0">
        <el-form-item label="课程名称">
          <el-input v-model="course.courseName"></el-input>
        </el-form-item>
        <el-form-item label="课程简介">
          <el-input v-model="course.brief"></el-input>
        </el-form-item>
        <el-form-item label="课程概述">
          <el-input style="margin-bottom: 10px" type="textarea" v-model="course.previewFirstField" placeholder="概述1">
          </el-input>
          <el-input type="textarea" v-model="course.previewSecondField" placeholder="概述2"></el-input>
        </el-form-item>
        <el-form-item label="讲师姓名">
          <el-input v-model="course.teacherDTO.teacherName"></el-input>
        </el-form-item>
        <el-form-item label="讲师简介">
          <el-input v-model="course.teacherDTO.description"></el-input>
        </el-form-item>
        <el-form-item label="课程排序">
          <el-input-number label="排序" v-model="course.sortNum"></el-input-number>
        </el-form-item>
      </div>
      <div v-show="activeStep === 1">
        <el-form-item label="课程封面">
          <!--
              组件需要根据绑定的数据进行图片预览
              组件需要把上传成功的图片同步到绑定的数据中
              v-model 本质是父子组件通信
                会给子组件传递一个叫 value 的数据 (props)
                默认监听 Input 事件，修改绑定的数据 (自定义事件)
            -->
          <course-image v-model="course.courseListImg"></course-image>
        </el-form-item>
        <el-form-item label="介绍封面">
          <course-image v-model="course.courseImgUrl"></course-image>
        </el-form-item>
      </div>
      <div v-show="activeStep === 2">
        <el-form-item label="售卖价格">
          <el-input v-model="course.discounts">
            <template slot="append">元</template>
          </el-input>
        </el-form-item>
        <el-form-item label="商品原价">
          <el-input v-model="course.price">
            <template slot="append">元</template>
          </el-input>
        </el-form-item>
        <el-form-item label="销量">
          <el-input v-model="course.sales">
            <template slot="append">单</template>
          </el-input>
        </el-form-item>
        <el-form-item label="活动标签">
          <el-input></el-input>
        </el-form-item>
      </div>
      <div v-show="activeStep === 3">
        <el-form-item label="限时秒杀开关" label-width="100">
          <el-switch v-model="course.activityCourse" active-color="#13ce66" inactive-color="#ff4949">
          </el-switch>
        </el-form-item>
        <template v-if="course.activityCourse">
          <el-form-item label="开始时间">
            <el-date-picker type="date" placeholder="选择开始时间" v-model="course.activityCourseDTO.beginTime"
              value-format="yyyy-MM-dd">
            </el-date-picker>
          </el-form-item>
          <el-form-item label="结束时间">
            <el-date-picker type="date" placeholder="选择结束时间" v-model="course.activityCourseDTO.endTime"
              value-format="yyyy-MM-dd">
            </el-date-picker>
          </el-form-item>
          <el-form-item label="秒杀价">
            <el-input v-model="course.activityCourseDTO.amount">
              <template slot="append">元</template>
            </el-input>
          </el-form-item>
          <el-form-item label="秒杀库存">
            <el-input v-model="course.activityCourseDTO.stock">
              <template slot="append">个</template>
            </el-input>
          </el-form-item>
        </template>
      </div>
      <div v-show="activeStep === 4">
        <el-form-item label="课程详情">
          <!-- <el-input type="textarea" v-model="course.courseDescriptionMarkDown"></el-input> -->
          <text-editor v-model="course.courseDescriptionMarkDown" />
        </el-form-item>
        <el-form-item label="是否发布">
          <el-switch v-model="course.status" active-color="#13ce66" inactive-color="#ff4949" :active-value="1"
            :inactive-value="0"></el-switch>
        </el-form-item>
        <el-form-item>
          <el-button type="primary" @click="handleSave">保存</el-button>
        </el-form-item>
      </div>
      <el-form-item v-if="activeStep < 4">
        <el-button @click="activeStep++">下一步</el-button>
      </el-form-item>
    </el-form>
  </el-card>
</template>

<script lang="ts">
import Vue from 'vue'
import {
  saveCourse,
  getCourseById
} from '@/services/course'
import CourseImage from './CourseImage.vue'
import TextEditor from '@/components/TextEditor/index.vue'
export default Vue.extend({
  name: 'CreateOrUpdate',
  components: {
    CourseImage,
    TextEditor
  },
  props: {
    isEdit: {
      type: Boolean,
      default: false
    },
    courseId: {
      type: [String, Number]
    }
  },
  data () {
    return {
      activeStep: 0,
      steps: [
        {
          title: '基本信息',
          icon: 'el-icon-edit'
        },
        {
          title: '课程封面',
          icon: 'el-icon-upload'
        },
        {
          title: '销售信息',
          icon: 'el-icon-picture'
        },
        {
          title: '秒杀活动',
          icon: 'el-icon-picture'
        },
        {
          title: '课程详情',
          icon: 'el-icon-picture'
        }
      ],
      imageUrl: '', // 预览图片地址
      isSeckill: false,
      course: {
        courseName: '',
        brief: '',
        teacherDTO: {
          teacherName: '',
          teacherHeadPicUrl: '',
          position: '',
          description: ''
        },
        courseDescriptionMarkDown: '',
        price: 0,
        discounts: 0,
        priceTag: '',
        discountsTag: '',
        isNew: true,
        isNewDes: '',
        courseListImg: '',
        courseImgUrl: '',
        sortNum: 0,
        previewFirstField: '',
        previewSecondField: '',
        status: 0,
        sales: 0,
        activityCourse: true,
        activityCourseDTO: {
          beginTime: '',
          endTime: '',
          amount: 0,
          stock: 0
        },
        autoOnlineTime: ''
      }
    }
  },
  created () {
    if (this.isEdit) {
      this.loadCourse()
    }
  },
  methods: {
    async handleSave () {
      const { data } = await saveCourse(this.course)
      this.$router.back()
    },
    async loadCourse () {
      const { data } = await getCourseById(this.courseId)
      this.course = data.data
    }
  }
})

</script>

<style lang="scss" scope>
  .el-step {
    cursor: pointer;
  }
</style>
